contoh modal expressing lack of necessity

Lack of necessity in the present:
- I don't have to run fast.
- I needn't buy all those things.

Lack of necessity in the past:
- I needn't have taken my jacket
- I didn't have to tell him about my homework. He already knew everything about it

Lack of necessity in the future:
- I won't have to take my umbrella. It won't be rain.
- I won't have to call on my mother tomorrow night. She'll be at the doctor's for her regular medical check up